1 /* Create clone of a given descriptor. 2 Copyright (C) 2003, 2004 Red Hat, Inc. 3 Written by Ulrich Drepper <drepper (at) redhat.com>, 2003. 4 5 This program is free software; you can redistribute it and/or modify 6 it under the terms of the GNU General Public License as published by 7 the Free Software Foundation, version 2. 8 9 This program is distributed in the hope that it will be useful, 10 but WITHOUT ANY WARRANTY; without even the implied warranty of 11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 12 GNU General Public License for more details. 13 14 You should have received a copy of the GNU General Public License 15 along with this program; if not, write to the Free Software Foundation, 16 Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ 17 18 #ifdef HAVE_CONFIG_H 19 # include <config.h> 20 #endif 21 22 #include <assert.h> 23 #include <stddef.h> 24 #include "libelfP.h" 25 #include "common.h" 26 27 28 Elf * 29 elf_clone (Elf *elf, Elf_Cmd cmd) 30 { 31 Elf *retval = NULL; 32 33 if (elf == NULL) 34 /* Some earlier mistake. */ 35 return NULL; 36 37 /* Make sure the descriptor is not suddenly going away. */ 38 rwlock_rdlock (elf->lock); 39 40 if (cmd != ELF_C_EMPTY) 41 // XXX TODO handle ELF_C_READ/WRITE etc 42 goto out; 43 44 retval = allocate_elf (elf->fildes, elf->map_address, elf->start_offset, 45 elf->maximum_size, elf->cmd, elf->parent, elf->kind, 46 elf->state.elf32.scns.max * sizeof (Elf_Scn)); 47 if (retval != NULL) 48 { 49 /* We have to write to the file in any case. */ 50 retval->flags = ELF_F_DIRTY; 51 52 /* Some more or less arbitrary value. */ 53 retval->state.elf.scnincr = 10; 54 55 /* We have allocated room for some sections. */ 56 assert (offsetof (struct Elf, state.elf32.scns) 57 == offsetof (struct Elf, state.elf64.scns)); 58 retval->state.elf.scns_last = &retval->state.elf32.scns; 59 retval->state.elf32.scns.max = elf->state.elf32.scns.max; 60 61 retval->class = elf->class; 62 } 63 64 /* Release the lock. */ 65 out: 66 rwlock_unlock (elf->lock); 67 68 return retval; 69 } 70
