/*-
 * Copyright (c) 1993 Paul Kranenburg
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *      This product includes software developed by Paul Kranenburg.
 * 4. The name of the author may not be used to endorse or promote products
 *    derived from this software without specific prior written permission
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 * $FreeBSD$
 */

/*
 * RRS section definitions.
 *
 * The layout of some data structures defined in this header file is
 * such that we can provide compatibility with the SunOS 4.x shared
 * library scheme.
 */

#ifndef _SYS_LINK_ELF_H_
#define _SYS_LINK_ELF_H_

#include <sys/elf.h>

/*
 * Flags that describe the origin of the entries in Dl_serinfo.
 * SunOS has these in <sys/link.h>, we follow the suit.
 */
#define LA_SER_ORIG     0x01    /* original (needed) name */
#define LA_SER_LIBPATH  0x02    /* LD_LIBRARY_PATH entry prepended */
#define LA_SER_RUNPATH  0x04    /* runpath entry prepended */
#define LA_SER_CONFIG   0x08    /* configuration entry prepended */
#define LA_SER_DEFAULT  0x40    /* default path prepended */
#define LA_SER_SECURE   0x80    /* default (secure) path prepended */

typedef struct link_map {
        caddr_t         l_addr;                 /* Base Address of library */
#ifdef __mips__
        caddr_t         l_offs;                 /* Load Offset of library */
#endif
        const char      *l_name;                /* Absolute Path to Library */
        const void      *l_ld;                  /* Pointer to .dynamic in memory */
        struct link_map *l_next, *l_prev;       /* linked list of of mapped libs */
} Link_map;

struct r_debug {
        int             r_version;              /* not used */
        struct link_map *r_map;                 /* list of loaded images */
        void            (*r_brk)(struct r_debug *, struct link_map *);
                                                /* pointer to break point */
        enum {
                RT_CONSISTENT,                  /* things are stable */
                RT_ADD,                         /* adding a shared library */
                RT_DELETE                       /* removing a shared library */
        }               r_state;
};

struct dl_phdr_info
{
        Elf_Addr dlpi_addr;                     /* module relocation base */
        const char *dlpi_name;                  /* module name */
        const Elf_Phdr *dlpi_phdr;              /* pointer to module's phdr */
        Elf_Half dlpi_phnum;                    /* number of entries in phdr */
        unsigned long long int dlpi_adds;       /* total # of loads */
        unsigned long long int dlpi_subs;       /* total # of unloads */
        size_t dlpi_tls_modid;
        void *dlpi_tls_data;
};

__BEGIN_DECLS

typedef int (*__dl_iterate_hdr_callback)(struct dl_phdr_info *, size_t, void *);
extern int dl_iterate_phdr(__dl_iterate_hdr_callback, void *);
int _rtld_addr_phdr(const void *, struct dl_phdr_info *);
int _rtld_get_stack_prot(void);
int _rtld_is_dlopened(void *);

#ifdef __ARM_EABI__
void * dl_unwind_find_exidx(const void *, int *);
#endif

__END_DECLS

#endif /* _SYS_LINK_ELF_H_ */