/*x.remscn.c - implementation of the elfx_remscn(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.remscn.c,v 1.11 2003/10/09 21:09:51 michael Exp $";#endif /* lint */size_telfx_remscn(Elf *elf, Elf_Scn *scn) {    Elf_Scn *pscn;    Scn_Data *sd;    Scn_Data *tmp;    size_t index;    if (!elf || !scn) {	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(elf->e_ehdr);    if (scn->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;    }    /*     * Find previous section.     */    for (pscn = elf->e_scn_1; pscn->s_link; pscn = pscn->s_link) {	if (pscn->s_link == scn) {	    break;	}    }    if (pscn->s_link != scn) {	seterr(ERROR_ELFSCNMISMATCH);	return SHN_UNDEF;    }    /*     * Unlink section.     */    if (elf->e_scn_n == scn) {	elf->e_scn_n = pscn;    }    pscn->s_link = scn->s_link;    index = scn->s_index;    /*     * Free section descriptor and data.     */    for (sd = scn->s_data_1; sd; sd = tmp) {	elf_assert(sd->sd_magic == DATA_MAGIC);	elf_assert(sd->sd_scn == scn);	tmp = sd->sd_link;	if (sd->sd_free_data && sd->sd_memdata) {	    free(sd->sd_memdata);	}	if (sd->sd_freeme) {	    free(sd);	}    }    if ((sd = scn->s_rawdata)) {	elf_assert(sd->sd_magic == DATA_MAGIC);	elf_assert(sd->sd_scn == scn);	if (sd->sd_free_data && sd->sd_memdata) {	    free(sd->sd_memdata);	}	if (sd->sd_freeme) {	    free(sd);	}    }    if (scn->s_freeme) {	elf_assert(scn->s_index > 0);	free(scn);    }    /*     * Adjust section indices.     */    for (scn = pscn->s_link; scn; scn = scn->s_link) {	elf_assert(scn->s_index > index);	scn->s_index--;    }    /*     * Adjust section count in ELF header     */    if (_elf_update_shnum(elf, elf->e_scn_n->s_index + 1)) {	return SHN_UNDEF;    }    return index;}