diff options
Diffstat (limited to 'libelf/gelf_getversym.c')
-rw-r--r-- | libelf/gelf_getversym.c | 89 |
1 files changed, 89 insertions, 0 deletions
diff --git a/libelf/gelf_getversym.c b/libelf/gelf_getversym.c new file mode 100644 index 00000000..fe8dc62b --- /dev/null +++ b/libelf/gelf_getversym.c @@ -0,0 +1,89 @@ +/* Get symbol version information at the given index. + Copyright (C) 1999, 2000, 2001, 2002, 2005, 2009, 2014 Red Hat, Inc. + This file is part of elfutils. + Written by Ulrich Drepper <drepper@redhat.com>, 1999. + + 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 <gelf.h> +#include <string.h> + +#include "libelfP.h" + + +GElf_Versym * +gelf_getversym (data, ndx, dst) + Elf_Data *data; + int ndx; + GElf_Versym *dst; +{ + Elf_Data_Scn *data_scn = (Elf_Data_Scn *) data; + Elf_Scn *scn; + GElf_Versym *result; + + if (data == NULL) + return NULL; + + if (unlikely (data->d_type != ELF_T_HALF)) + { + __libelf_seterrno (ELF_E_INVALID_HANDLE); + return NULL; + } + + /* This is the one place where we have to take advantage of the fact + that an `Elf_Data' pointer is also a pointer to `Elf_Data_Scn'. + The interface is broken so that it requires this hack. */ + scn = data_scn->s; + + /* It's easy to handle this type. It has the same size for 32 and + 64 bit objects. */ + assert (sizeof (GElf_Versym) == sizeof (Elf32_Versym)); + assert (sizeof (GElf_Versym) == sizeof (Elf64_Versym)); + + rwlock_rdlock (scn->elf->lock); + + /* The data is already in the correct form. Just make sure the + index is OK. */ + if (INVALID_NDX (ndx, GElf_Versym, data)) + { + __libelf_seterrno (ELF_E_INVALID_INDEX); + result = NULL; + } + else + { + *dst = ((GElf_Versym *) data->d_buf)[ndx]; + + result = dst; + } + + rwlock_unlock (scn->elf->lock); + + return result; +} |