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      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