_elf.h revision 1976:f0691a145b7e 
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, Version 1.0 only
6 * (the "License").  You may not use this file except in compliance
7 * with the License.
8 *
9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10 * or http://www.opensolaris.org/os/licensing.
11 * See the License for the specific language governing permissions
12 * and limitations under the License.
13 *
14 * When distributing Covered Code, include this CDDL HEADER in each
15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16 * If applicable, add the following below this CDDL HEADER, with the
17 * fields enclosed by brackets "[]" replaced with your own identifying
18 * information: Portions Copyright [yyyy] [name of copyright owner]
19 *
20 * CDDL HEADER END
21 */
22/*
23 *	Copyright (c) 1988 AT&T
24 *	  All Rights Reserved
25 *
26 *
27 *	Copyright 2005 Sun Microsystems, Inc.  All rights reserved.
28 *	Use is subject to license terms.
29 */
30
31#ifndef	__ELF_DOT_H
32#define	__ELF_DOT_H
33
34#pragma ident	"%Z%%M%	%I%	%E% SMI"
35
36#include <sys/types.h>
37#include <elf.h>
38#include <_rtld.h>
39
40#ifdef	__cplusplus
41extern "C" {
42#endif
43
44/*
45 * Common extern functions for ELF file class.
46 */
47extern	int	elf_reloc(Rt_map *, uint_t);
48extern	void	elf_plt_init(void *, caddr_t);
49extern	int	elf_set_prot(Rt_map *, int);
50extern	Rt_map	*elf_obj_file(Lm_list *, Aliste, const char *, int);
51extern	Rt_map	*elf_obj_fini(Lm_list *, Rt_map *);
52extern	int	elf_copy_reloc(char *, Sym *, Rt_map *, void *, Sym *,
53		    Rt_map *, const void *);
54extern	Sym	*elf_find_sym(Slookup *, Rt_map **, uint_t *);
55extern	Sym	*elf_lazy_find_sym(Slookup *, Rt_map **, uint_t *);
56extern	Rt_map	*elf_lazy_load(Rt_map *, uint_t, const char *);
57extern	Sym	*elf_lookup_filtee(Slookup *, Rt_map **, uint_t *, uint_t);
58extern	Rt_map	*elf_new_lm(Lm_list *, const char *, const char *, Dyn *,
59		    ulong_t, ulong_t, Aliste, ulong_t, ulong_t, ulong_t,
60		    ulong_t, Mmap *, uint_t);
61extern	int	elf_rtld_load();
62
63#if	defined(__sparcv9)
64extern	void	elf_plt2_init(uint_t *, Rt_map *);
65#endif
66
67#if	defined(i386)
68extern	ulong_t	elf_reloc_relacount(ulong_t, ulong_t, ulong_t, ulong_t);
69extern	int	elf_copy_gen(Rt_map *);
70#endif
71
72/*
73 * Padinfo
74 *
75 * Used to track the which PLTpadd entries have been used and
76 * to where they are bound.
77 *
78 * NOTE: these are only currently used for SparcV9
79 */
80typedef struct pltpadinfo {
81	Addr	pp_addr;
82	void	*pp_plt;
83} Pltpadinfo;
84
85/*
86 * Private data for an ELF file class.
87 */
88typedef struct _rt_elf_private {
89	void		*e_symtab;	/* symbol table */
90	uint_t		*e_hash;	/* hash table */
91	char		*e_strtab;	/* string table */
92	void		*e_reloc;	/* relocation table */
93	uint_t		*e_pltgot;	/* addrs for procedure linkage table */
94	void		*e_pltreserve;	/* ia64: DT_IA_64_PLTRESERVE */
95	void		*e_dynplt;	/* dynamic plt table - used by prof */
96	void		*e_jmprel;	/* plt relocations */
97	ulong_t		e_pltrelsize;	/* size of PLT relocation entries */
98	ulong_t		e_relsz;	/* size of relocs */
99	ulong_t		e_relent;	/* size of base reloc entry */
100	ulong_t		e_movesz;	/* size of movetabs */
101	ulong_t		e_moveent;	/* size of base movetab entry */
102	ulong_t		e_tlsstatoff;	/* TLS offset into static block */
103	void		*e_movetab;	/* movetable address */
104	Phdr		*e_sunwbss;	/* program header for SUNWBSS */
105	Phdr		*e_pttls;	/* PT_TLS */
106	Phdr		*e_ptunwind;	/* PT_SUNW_UNWIND (amd64 specific) */
107	ulong_t		e_syment;	/* size of symtab entry */
108	ulong_t		e_entry;	/* entry point for file */
109	Verneed		*e_verneed;	/* versions needed by this image and */
110	int		e_verneednum;	/*	their associated count */
111	Verdef		*e_verdef;	/* versions defined by this image and */
112	int		e_verdefnum;	/*	their associated count */
113	ulong_t		e_syminent;	/* syminfo entry size */
114	void		*e_pltpad;	/* PLTpad table */
115	void		*e_pltpadend;	/* end of PLTpad table */
116} Rt_elfp;
117
118/*
119 * Macros for getting to linker ELF private data.
120 */
121#define	ELFPRV(X)	((X)->rt_priv)
122#define	SYMTAB(X)	(((Rt_elfp *)(X)->rt_priv)->e_symtab)
123#define	HASH(X)		(((Rt_elfp *)(X)->rt_priv)->e_hash)
124#define	STRTAB(X)	(((Rt_elfp *)(X)->rt_priv)->e_strtab)
125#define	REL(X)		(((Rt_elfp *)(X)->rt_priv)->e_reloc)
126#define	PLTGOT(X)	(((Rt_elfp *)(X)->rt_priv)->e_pltgot)
127#define	MOVESZ(X)	(((Rt_elfp *)(X)->rt_priv)->e_movesz)
128#define	MOVEENT(X)	(((Rt_elfp *)(X)->rt_priv)->e_moveent)
129#define	MOVETAB(X)	(((Rt_elfp *)(X)->rt_priv)->e_movetab)
130#define	DYNPLT(X)	(((Rt_elfp *)(X)->rt_priv)->e_dynplt)
131#define	JMPREL(X)	(((Rt_elfp *)(X)->rt_priv)->e_jmprel)
132#define	PTTLS(X)	(((Rt_elfp *)(X)->rt_priv)->e_pttls)
133#define	PTUNWIND(X)	(((Rt_elfp *)(X)->rt_priv)->e_ptunwind)
134#define	TLSSTATOFF(X)	(((Rt_elfp *)(X)->rt_priv)->e_tlsstatoff)
135#define	PLTRELSZ(X)	(((Rt_elfp *)(X)->rt_priv)->e_pltrelsize)
136#define	RELSZ(X)	(((Rt_elfp *)(X)->rt_priv)->e_relsz)
137#define	RELENT(X)	(((Rt_elfp *)(X)->rt_priv)->e_relent)
138#define	SYMENT(X)	(((Rt_elfp *)(X)->rt_priv)->e_syment)
139#define	ENTRY(X)	(((Rt_elfp *)(X)->rt_priv)->e_entry)
140#define	VERNEED(X)	(((Rt_elfp *)(X)->rt_priv)->e_verneed)
141#define	VERNEEDNUM(X)	(((Rt_elfp *)(X)->rt_priv)->e_verneednum)
142#define	VERDEF(X)	(((Rt_elfp *)(X)->rt_priv)->e_verdef)
143#define	VERDEFNUM(X)	(((Rt_elfp *)(X)->rt_priv)->e_verdefnum)
144#define	SUNWBSS(X)	(((Rt_elfp *)(X)->rt_priv)->e_sunwbss)
145#define	SYMINENT(X)	(((Rt_elfp *)(X)->rt_priv)->e_syminent)
146#define	PLTPAD(X)	(((Rt_elfp *)(X)->rt_priv)->e_pltpad)
147#define	PLTPADEND(X)	(((Rt_elfp *)(X)->rt_priv)->e_pltpadend)
148#define	PLTRESERVE(X)	(((Rt_elfp *)(X)->rt_priv)->e_pltreserve)
149
150#ifdef	__cplusplus
151}
152#endif
153
154#endif	/* __ELF_DOT_H */
155