/* x.remscn.c - implementation of the elfx_remscn(3) function. Copyright (C) 1995 - 2001, 2003 Michael Riepe This library is free software; you can redistribute it and/or modify it under the terms of the GNU Library General Public License as published by the Free Software Foundation; either version 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 of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Library General Public License for more details. You should have received a copy of the GNU Library General Public License along with this library; if not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ #include #ifndef lint static const char rcsid[] = "@(#) $Id: x.remscn.c,v 1.11 2003/10/09 21:09:51 michael Exp $"; #endif /* lint */ size_t elfx_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; }
