_elf.h revision 11827:d7ef53deac3f
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 2010 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 <sgs.h> 35#include <elf.h> 36#include <_rtld.h> 37 38#ifdef __cplusplus 39extern "C" { 40#endif 41 42/* 43 * Common extern functions for ELF file class. 44 */ 45extern int elf_config(Rt_map *, int); 46extern Rtc_obj *elf_config_ent(const char *, Word, int, const char **); 47extern void elf_config_flt(Lm_list *, const char *, const char *, 48 Alist **, Aliste); 49#if defined(__i386) 50extern int elf_copy_gen(Rt_map *); 51#endif 52extern int elf_copy_reloc(char *, Sym *, Rt_map *, void *, Sym *, 53 Rt_map *, const void *); 54extern int elf_find_sym(Slookup *, Sresult *, uint_t *, int *); 55extern int elf_lazy_find_sym(Slookup *, Sresult *, uint_t *, int *); 56extern Rt_map *elf_lazy_load(Rt_map *, Slookup *, uint_t, const char *, 57 uint_t, Grp_hdl **, int *); 58extern int elf_lookup_filtee(Slookup *, Sresult *, uint_t *, uint_t, 59 int *); 60extern int elf_mach_flags_check(Rej_desc *, Ehdr *); 61extern Rt_map *elf_new_lmp(Lm_list *, Aliste, Fdesc *, Addr, size_t, void *, 62 int *); 63extern Rt_map *elf_obj_file(Lm_list *, Aliste, const char *, 64 mmapobj_result_t *, mmapobj_result_t *, uint_t); 65extern Rt_map *elf_obj_fini(Lm_list *, Rt_map *, int *); 66extern void elf_plt_init(void *, caddr_t); 67#if defined(__sparcv9) 68extern void elf_plt2_init(uint_t *, Rt_map *); 69#endif 70extern int elf_reloc(Rt_map *, uint_t, int *, APlist **); 71extern void elf_reloc_bad(Rt_map *, void *, uchar_t, ulong_t, 72 ulong_t); 73extern int elf_reloc_error(Rt_map *, const char *, void *, uint_t); 74extern ulong_t elf_reloc_relative(ulong_t, ulong_t, ulong_t, ulong_t, 75 Rt_map *, APlist **); 76extern ulong_t elf_reloc_relative_count(ulong_t, ulong_t, ulong_t, ulong_t, 77 Rt_map *, APlist **); 78extern int elf_rtld_load(); 79extern long elf_static_tls(Rt_map *, Sym *, void *, uchar_t, char *, 80 ulong_t, long); 81extern Fct *elf_verify(caddr_t, size_t, Fdesc *, const char *, Rej_desc *); 82extern int elf_verify_vers(const char *, Rt_map *, Rt_map *); 83 84/* 85 * Padinfo 86 * 87 * Used to track the which PLTpadd entries have been used and 88 * to where they are bound. 89 * 90 * NOTE: these are only currently used for SparcV9 91 */ 92typedef struct pltpadinfo { 93 Addr pp_addr; 94 void *pp_plt; 95} Pltpadinfo; 96 97/* 98 * Private data for an ELF file class. 99 */ 100typedef struct _rt_elf_private { 101 void *e_symtab; /* symbol table */ 102 void *e_sunwsymtab; /* symtab augmented with local fcns */ 103 uint_t *e_hash; /* hash table */ 104 char *e_strtab; /* string table */ 105 void *e_reloc; /* relocation table */ 106 uint_t *e_pltgot; /* addrs for procedure linkage table */ 107 void *e_jmprel; /* plt relocations */ 108 ulong_t e_sunwsortent; /* size of sunw[sym|tls]sort entry */ 109 uint_t *e_sunwsymsort; /* sunwsymtab indices sorted by addr */ 110 ulong_t e_sunwsymsortsz; /* size of sunwsymtab */ 111 ulong_t e_sunwsymsz; /* size of e_sunwsymtab */ 112 ulong_t e_pltrelsize; /* size of PLT relocation entries */ 113 ulong_t e_relsz; /* size of relocs */ 114 ulong_t e_relent; /* size of base reloc entry */ 115 ulong_t e_movesz; /* size of movetabs */ 116 ulong_t e_moveent; /* size of base movetab entry */ 117 ulong_t e_tlsstatoff; /* TLS offset into static block */ 118 void *e_movetab; /* movetable address */ 119 Phdr *e_pttls; /* PT_TLS */ 120 Phdr *e_ptunwind; /* PT_SUNW_UNWIND (amd64 specific) */ 121 ulong_t e_syment; /* size of symtab entry */ 122 Verneed *e_verneed; /* versions needed by this image and */ 123 int e_verneednum; /* their associated count */ 124 Verdef *e_verdef; /* versions defined by this image and */ 125 int e_verdefnum; /* their associated count */ 126 Versym *e_versym; /* Per-symbol versions */ 127 ulong_t e_syminent; /* syminfo entry size */ 128 void *e_pltpad; /* PLTpad table */ 129 void *e_pltpadend; /* end of PLTpad table */ 130 Syscapset e_capset; /* capabilities set */ 131 Capinfo *e_capinfo; /* symbol capabilities information */ 132 uint_t e_capchainent; /* size of capabilities chain entry */ 133 uint_t e_capchainsz; /* size of capabilities chain data */ 134} Rt_elfp; 135 136/* 137 * Macros for getting to linker ELF private data. 138 */ 139#define ELFPRV(X) ((X)->rt_priv) 140#define SYMTAB(X) (((Rt_elfp *)(X)->rt_priv)->e_symtab) 141#define SUNWSYMTAB(X) (((Rt_elfp *)(X)->rt_priv)->e_sunwsymtab) 142#define HASH(X) (((Rt_elfp *)(X)->rt_priv)->e_hash) 143#define STRTAB(X) (((Rt_elfp *)(X)->rt_priv)->e_strtab) 144#define REL(X) (((Rt_elfp *)(X)->rt_priv)->e_reloc) 145#define PLTGOT(X) (((Rt_elfp *)(X)->rt_priv)->e_pltgot) 146#define MOVESZ(X) (((Rt_elfp *)(X)->rt_priv)->e_movesz) 147#define MOVEENT(X) (((Rt_elfp *)(X)->rt_priv)->e_moveent) 148#define MOVETAB(X) (((Rt_elfp *)(X)->rt_priv)->e_movetab) 149#define JMPREL(X) (((Rt_elfp *)(X)->rt_priv)->e_jmprel) 150#define SUNWSYMSZ(X) (((Rt_elfp *)(X)->rt_priv)->e_sunwsymsz) 151#define PTTLS(X) (((Rt_elfp *)(X)->rt_priv)->e_pttls) 152#define PTUNWIND(X) (((Rt_elfp *)(X)->rt_priv)->e_ptunwind) 153#define TLSSTATOFF(X) (((Rt_elfp *)(X)->rt_priv)->e_tlsstatoff) 154#define PLTRELSZ(X) (((Rt_elfp *)(X)->rt_priv)->e_pltrelsize) 155#define RELSZ(X) (((Rt_elfp *)(X)->rt_priv)->e_relsz) 156#define RELENT(X) (((Rt_elfp *)(X)->rt_priv)->e_relent) 157#define SYMENT(X) (((Rt_elfp *)(X)->rt_priv)->e_syment) 158#define VERNEED(X) (((Rt_elfp *)(X)->rt_priv)->e_verneed) 159#define VERNEEDNUM(X) (((Rt_elfp *)(X)->rt_priv)->e_verneednum) 160#define VERDEF(X) (((Rt_elfp *)(X)->rt_priv)->e_verdef) 161#define VERDEFNUM(X) (((Rt_elfp *)(X)->rt_priv)->e_verdefnum) 162#define VERSYM(X) (((Rt_elfp *)(X)->rt_priv)->e_versym) 163#define SYMINENT(X) (((Rt_elfp *)(X)->rt_priv)->e_syminent) 164#define PLTPAD(X) (((Rt_elfp *)(X)->rt_priv)->e_pltpad) 165#define PLTPADEND(X) (((Rt_elfp *)(X)->rt_priv)->e_pltpadend) 166#define SUNWSORTENT(X) (((Rt_elfp *)(X)->rt_priv)->e_sunwsortent) 167#define SUNWSYMSORT(X) (((Rt_elfp *)(X)->rt_priv)->e_sunwsymsort) 168#define SUNWSYMSORTSZ(X) (((Rt_elfp *)(X)->rt_priv)->e_sunwsymsortsz) 169#define CAPSET(X) (((Rt_elfp *)(X)->rt_priv)->e_capset) 170#define CAPINFO(X) (((Rt_elfp *)(X)->rt_priv)->e_capinfo) 171#define CAPCHAINENT(X) (((Rt_elfp *)(X)->rt_priv)->e_capchainent) 172#define CAPCHAINSZ(X) (((Rt_elfp *)(X)->rt_priv)->e_capchainsz) 173 174/* 175 * Most of the above macros are used from ELF specific routines, however there 176 * are a couple of instances where we need to ensure the file being processed 177 * is ELF before dereferencing the macro. 178 */ 179#define THIS_IS_ELF(X) (FCT(X) == &elf_fct) 180#define THIS_IS_NOT_ELF(X) (FCT(X) != &elf_fct) 181 182#ifdef __cplusplus 183} 184#endif 185 186#endif /* __ELF_DOT_H */ 187