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1 : : /* Create clone of a given descriptor. 2 : : Copyright (C) 2003, 2004 Red Hat, Inc. 3 : : This file is part of elfutils. 4 : : Written by Ulrich Drepper <drepper@redhat.com>, 2003. 5 : : 6 : : This file is free software; you can redistribute it and/or modify 7 : : it under the terms of either 8 : : 9 : : * the GNU Lesser General Public License as published by the Free 10 : : Software Foundation; either version 3 of the License, or (at 11 : : your option) any later version 12 : : 13 : : or 14 : : 15 : : * the GNU General Public License as published by the Free 16 : : Software Foundation; either version 2 of the License, or (at 17 : : your option) any later version 18 : : 19 : : or both in parallel, as here. 20 : : 21 : : elfutils is distributed in the hope that it will be useful, but 22 : : WITHOUT ANY WARRANTY; without even the implied warranty of 23 : : MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 24 : : General Public License for more details. 25 : : 26 : : You should have received copies of the GNU General Public License and 27 : : the GNU Lesser General Public License along with this program. If 28 : : not, see <http://www.gnu.org/licenses/>. */ 29 : : 30 : : #ifdef HAVE_CONFIG_H 31 : : # include <config.h> 32 : : #endif 33 : : 34 : : #include <assert.h> 35 : : #include <stddef.h> 36 : : #include "libelfP.h" 37 : : #include "common.h" 38 : : 39 : : 40 : : Elf * 41 : 86 : elf_clone (Elf *elf, Elf_Cmd cmd) 42 : : { 43 : 86 : Elf *retval = NULL; 44 : : 45 [ - + ]: 86 : if (elf == NULL) 46 : : /* Some earlier mistake. */ 47 : : return NULL; 48 : : 49 : : /* Make sure the descriptor is not suddenly going away. */ 50 : 86 : rwlock_rdlock (elf->lock); 51 : : 52 [ - + ]: 86 : if (cmd != ELF_C_EMPTY) 53 : : // XXX TODO handle ELF_C_READ/WRITE etc 54 : 0 : goto out; 55 : : 56 : 172 : retval = allocate_elf (elf->fildes, elf->map_address, elf->start_offset, 57 : : elf->maximum_size, elf->cmd, elf->parent, elf->kind, 58 : 86 : elf->state.elf32.scns.max * sizeof (Elf_Scn)); 59 [ - + ]: 86 : if (retval != NULL) 60 : : { 61 : : /* We have to write to the file in any case. */ 62 : 86 : retval->flags = ELF_F_DIRTY; 63 : : 64 : : /* Some more or less arbitrary value. */ 65 : 86 : retval->state.elf.scnincr = 10; 66 : : 67 : : /* We have allocated room for some sections. */ 68 : 86 : assert (offsetof (struct Elf, state.elf32.scns) 69 : : == offsetof (struct Elf, state.elf64.scns)); 70 : 86 : retval->state.elf.scns_last = &retval->state.elf32.scns; 71 : 86 : retval->state.elf32.scns.max = elf->state.elf32.scns.max; 72 : : 73 : 86 : retval->class = elf->class; 74 : : } 75 : : 76 : : /* Release the lock. */ 77 : 0 : out: 78 : : rwlock_unlock (elf->lock); 79 : : 80 : : return retval; 81 : : }