| /* Create clone of a given descriptor. |
| Copyright (C) 2003, 2004 Red Hat, Inc. |
| This file is part of elfutils. |
| Written by Ulrich Drepper <drepper@redhat.com>, 2003. |
| |
| This file is free software; you can redistribute it and/or modify |
| it under the terms of either |
| |
| * the GNU Lesser General Public License as published by the Free |
| Software Foundation; either version 3 of the License, or (at |
| your option) any later version |
| |
| or |
| |
| * the GNU General Public License as published by the Free |
| Software Foundation; either version 2 of the License, or (at |
| your option) any later version |
| |
| or both in parallel, as here. |
| |
| elfutils 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 |
| General Public License for more details. |
| |
| You should have received copies of the GNU General Public License and |
| the GNU Lesser General Public License along with this program. If |
| not, see <http://www.gnu.org/licenses/>. */ |
| |
| #ifdef HAVE_CONFIG_H |
| # include <config.h> |
| #endif |
| |
| #include <assert.h> |
| #include <stddef.h> |
| #include "libelfP.h" |
| #include "common.h" |
| |
| |
| Elf * |
| elf_clone (Elf *elf, Elf_Cmd cmd) |
| { |
| Elf *retval = NULL; |
| |
| if (elf == NULL) |
| /* Some earlier mistake. */ |
| return NULL; |
| |
| /* Make sure the descriptor is not suddenly going away. */ |
| rwlock_rdlock (elf->lock); |
| |
| if (cmd != ELF_C_EMPTY) |
| // XXX TODO handle ELF_C_READ/WRITE etc |
| goto out; |
| |
| retval = allocate_elf (elf->fildes, elf->map_address, elf->start_offset, |
| elf->maximum_size, elf->cmd, elf->parent, elf->kind, |
| elf->state.elf32.scns.max * sizeof (Elf_Scn)); |
| if (retval != NULL) |
| { |
| /* We have to write to the file in any case. */ |
| retval->flags = ELF_F_DIRTY; |
| |
| /* Some more or less arbitrary value. */ |
| retval->state.elf.scnincr = 10; |
| |
| /* We have allocated room for some sections. */ |
| assert (offsetof (struct Elf, state.elf32.scns) |
| == offsetof (struct Elf, state.elf64.scns)); |
| retval->state.elf.scns_last = &retval->state.elf32.scns; |
| retval->state.elf32.scns.max = elf->state.elf32.scns.max; |
| |
| retval->class = elf->class; |
| } |
| |
| /* Release the lock. */ |
| out: |
| rwlock_unlock (elf->lock); |
| |
| return retval; |
| } |