/*x.movscn.c - implementation of the elfx_movscn(3) function.Copyright (C) 1995 - 2001, 2003 Michael Riepe <michael@stud.uni-hannover.de>This library is free software; you can redistribute it and/ormodify it under the terms of the GNU Library General PublicLicense as published by the Free Software Foundation; eitherversion 2 of the License, or (at your option) any later version.This library is distributed in the hope that it will be useful,but WITHOUT ANY WARRANTY; without even the implied warranty ofMERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNULibrary General Public License for more details.You should have received a copy of the GNU Library General PublicLicense along with this library; if not, write to the Free SoftwareFoundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.*/#include <private.h>#ifndef lintstatic const char rcsid[] = "@(#) $Id: x.movscn.c,v 1.10 2003/10/09 21:09:51 michael Exp $";#endif /* lint */size_telfx_movscn(Elf *elf, Elf_Scn *scn, Elf_Scn *after) {    Elf_Scn *prev;    Elf_Scn *tmp;    int off;    if (!elf || !scn || !after) {	return SHN_UNDEF;    }    elf_assert(elf->e_magic == ELF_MAGIC);    if (elf->e_kind != ELF_K_ELF) {	seterr(ERROR_NOTELF);	return SHN_UNDEF;    }    elf_assert(scn->s_magic == SCN_MAGIC);    elf_assert(after->s_magic == SCN_MAGIC);    if (scn->s_elf != elf || after->s_elf != elf) {	seterr(ERROR_ELFSCNMISMATCH);	return SHN_UNDEF;    }    elf_assert(elf->e_scn_1);    if (scn == elf->e_scn_1) {	seterr(ERROR_NULLSCN);	return SHN_UNDEF;    }    if (scn == after || scn == after->s_link) {	/* nothing to do */	return scn->s_index;    }    /*     * Find previous section.     */    prev = NULL;    for (tmp = elf->e_scn_1; tmp->s_link; tmp = tmp->s_link) {	if (tmp->s_link == scn) {	    prev = tmp;	    break;	}    }    elf_assert(prev != NULL);    /*     * Update section indices     */    off = 0;    for (tmp = elf->e_scn_1; tmp; tmp = tmp->s_link) {	if (off) {	    tmp->s_index += off;	}	if (tmp == after) {	    off++;	}	else if (tmp == scn) {	    off--;	}    }    elf_assert(off == 0);    /*     * Move section.     */    prev->s_link = scn->s_link;    scn->s_link = after->s_link;    after->s_link = scn;    scn->s_index = after->s_index + 1;    if (elf->e_scn_n == scn) {	elf->e_scn_n = prev;    }    else if (elf->e_scn_n == after) {	elf->e_scn_n = scn;    }#if ENABLE_DEBUG    /*     * Check section indices     */    tmp = elf->e_scn_1;    elf_assert(tmp->s_index == 0);    while (tmp->s_link) {	elf_assert(tmp->s_link->s_index == tmp->s_index + 1);	tmp = tmp->s_link;    }#endif /* ENABLE_DEBUG */    return scn->s_index;}