librtld/common/_librtld.h

	_librtld.h revision 2926dd2e801916128855cec712d18656be9bd1c5
/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License (the "License").
 * You may not use this file except in compliance with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 */

/*
 * Copyright 2006 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

#ifndef __LIBRTLD_H
#define __LIBRTLD_H

#pragma ident   "%Z%%M% %I% %E% SMI"

#include <libelf.h>
#include <rtld.h>
#include <machdep.h>

#ifdef  __cplusplus
extern "C" {
#endif


/*
 * Define a cache structure that is used to retain all elf section information.
 */
typedef struct cache {
    int     c_flags;
    Elf_Scn     *c_scn;
    Shdr        *c_shdr;
    Elf_Data    *c_data;
    char        *c_name;
    void        *c_info;
} Cache;

#define FLG_C_EXCLUDE   1       /* exclude section from output image */
#define FLG_C_HEAP  2       /* heap section (addition) */
#define FLG_C_RELOC 3       /* relocation section requiring */
                    /*  modification */
#define FLG_C_SHSTR 4       /* section header string table */
#define FLG_C_END   5       /* null terminating section marker */


/*
 * Define a structure for maintaining relocation information.  During the first
 * pass through an input files relocation records, counts are maintained of the
 * number of relocations to recreate in the output image.  The intent is to
 * localize any remaining relocation records.  The relocation structure
 * indicates the actions that must be performed on the output images relocation
 * information.
 */
typedef struct reloc {
    int     r_flags;
    Xword       r_pltndx;   /* pltndx if a JMP relocation */
    Addr        r_value;    /* value to apply to relocation */
    unsigned long   r_size;     /* size (used for copy relocations) */
    const char  *r_name;        /* relocation symbol */
} Reloc;

#define FLG_R_UNDO  0x01        /* undo any relocation offset value */
#define FLG_R_CLR   0x02        /* clear the relocation record */
#define FLG_R_INC   0x04        /* increment the relocation offset */
                    /*  (uses new fixed addr) */
#define FLG_R_APPLY 0x08        /* apply the relocation */


/*
 * Define any local prototypes.
 */
extern  void    apply_reloc(void *, Reloc *, const char *, uchar_t *, Rt_map *);
extern  void    clear_reloc(void *);
extern  int count_reloc(Cache *, Cache *, Rt_map *, int, Addr, Xword *,
            Xword *, Xword *, Alist *);
extern  void    inc_reloc(void *, void *, Reloc *, uchar_t *, uchar_t *);
extern  int syminfo(Cache *, Alist **);
extern  void    undo_reloc(void *, uchar_t *, uchar_t *, Reloc *);
extern  int update_dynamic(Cache *, Cache *, Rt_map *, int, Addr, Off,
            const char *, Xword, Xword, Xword, Xword, Xword);
extern  void    update_reloc(Cache *, Cache *, Cache *, const char *,
            Rt_map *, Rel **, Rel **, Rel **);
extern  void    update_sym(Cache *, Cache *, Addr, Half, Addr);

#ifdef  __cplusplus
}
#endif

#endif /* __LIBRTLD_H */