1/*-
  2 * SPDX-License-Identifier: BSD-4-Clause
  3 *
  4 * Copyright (c) 1993 Paul Kranenburg
  5 * All rights reserved.
  6 *
  7 * Redistribution and use in source and binary forms, with or without
  8 * modification, are permitted provided that the following conditions
  9 * are met:
 10 * 1. Redistributions of source code must retain the above copyright
 11 *    notice, this list of conditions and the following disclaimer.
 12 * 2. Redistributions in binary form must reproduce the above copyright
 13 *    notice, this list of conditions and the following disclaimer in the
 14 *    documentation and/or other materials provided with the distribution.
 15 * 3. All advertising materials mentioning features or use of this software
 16 *    must display the following acknowledgement:
 17 *      This product includes software developed by Paul Kranenburg.
 18 * 4. The name of the author may not be used to endorse or promote products
 19 *    derived from this software without specific prior written permission
 20 *
 21 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 22 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 23 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 24 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 26 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 27 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 28 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 29 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 30 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 31 */
 32
 33/*
 34 * RRS section definitions.
 35 *
 36 * The layout of some data structures defined in this header file is
 37 * such that we can provide compatibility with the SunOS 4.x shared
 38 * library scheme.
 39 */
 40
 41#ifndef _SYS_LINK_ELF_H_
 42#define	_SYS_LINK_ELF_H_
 43
 44#include <sys/elf.h>
 45
 46/*
 47 * Flags that describe the origin of the entries in Dl_serinfo.
 48 * SunOS has these in <sys/link.h>, we follow the suit.
 49 */
 50#define	LA_SER_ORIG	0x01	/* original (needed) name */
 51#define	LA_SER_LIBPATH	0x02	/* LD_LIBRARY_PATH entry prepended */
 52#define	LA_SER_RUNPATH	0x04	/* runpath entry prepended */
 53#define	LA_SER_CONFIG	0x08	/* configuration entry prepended */
 54#define	LA_SER_DEFAULT	0x40	/* default path prepended */
 55#define	LA_SER_SECURE	0x80	/* default (secure) path prepended */
 56
 57typedef struct link_map {
 58	caddr_t		l_base;			/* Base Address of library */
 59	const char	*l_name;		/* Absolute Path to Library */
 60	const void	*l_ld;			/* Pointer to .dynamic in memory */
 61	struct link_map	*l_next, *l_prev;	/* linked list of mapped libs */
 62	caddr_t		l_addr;			/* Load Offset of library */
 63	const char	*l_refname;		/* object we are filtering for */
 64} Link_map;
 65
 66struct r_debug {
 67	int		r_version;		/* Currently '1' */
 68	struct link_map *r_map;			/* list of loaded images */
 69	void		(*r_brk)(struct r_debug *, struct link_map *);
 70						/* pointer to break point */
 71	enum {
 72		RT_CONSISTENT,			/* things are stable */
 73		RT_ADD,				/* adding a shared library */
 74		RT_DELETE			/* removing a shared library */
 75	}		r_state;
 76	void		*r_ldbase;		/* Base address of rtld */
 77};
 78
 79#define	R_DEBUG_VERSION		1
 80
 81struct dl_phdr_info
 82{
 83	Elf_Addr dlpi_addr;			/* module relocation base */
 84	const char *dlpi_name;			/* module name */
 85	const Elf_Phdr *dlpi_phdr;		/* pointer to module's phdr */
 86	Elf_Half dlpi_phnum;			/* number of entries in phdr */
 87	unsigned long long int dlpi_adds;	/* total # of loads */
 88	unsigned long long int dlpi_subs;	/* total # of unloads */
 89	size_t dlpi_tls_modid;
 90	void *dlpi_tls_data;
 91};
 92
 93__BEGIN_DECLS
 94
 95typedef int (*__dl_iterate_hdr_callback)(struct dl_phdr_info *, size_t, void *);
 96extern int dl_iterate_phdr(__dl_iterate_hdr_callback, void *);
 97int _rtld_addr_phdr(const void *, struct dl_phdr_info *);
 98int _rtld_get_stack_prot(void);
 99int _rtld_is_dlopened(void *);
100
101#ifdef __ARM_EABI__
102void * dl_unwind_find_exidx(const void *, int *);
103#endif
104
105__END_DECLS
106
107#endif /* _SYS_LINK_ELF_H_ */