| /* Find debugging and symbol information for a module in libdwfl. |
| Copyright (C) 2006,2007 Red Hat, Inc. |
| This file is part of Red Hat elfutils. |
| |
| Red Hat elfutils is free software; you can redistribute it and/or modify |
| it under the terms of the GNU General Public License as published by the |
| Free Software Foundation; version 2 of the License. |
| |
| Red Hat 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 a copy of the GNU General Public License along |
| with Red Hat elfutils; if not, write to the Free Software Foundation, |
| Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301 USA. |
| |
| In addition, as a special exception, Red Hat, Inc. gives You the |
| additional right to link the code of Red Hat elfutils with code licensed |
| under any Open Source Initiative certified open source license |
| (http://www.opensource.org/licenses/index.php) which requires the |
| distribution of source code with any binary distribution and to |
| distribute linked combinations of the two. Non-GPL Code permitted under |
| this exception must only link to the code of Red Hat elfutils through |
| those well defined interfaces identified in the file named EXCEPTION |
| found in the source code files (the "Approved Interfaces"). The files |
| of Non-GPL Code may instantiate templates or use macros or inline |
| functions from the Approved Interfaces without causing the resulting |
| work to be covered by the GNU General Public License. Only Red Hat, |
| Inc. may make changes or additions to the list of Approved Interfaces. |
| Red Hat's grant of this exception is conditioned upon your not adding |
| any new exceptions. If you wish to add a new Approved Interface or |
| exception, please contact Red Hat. You must obey the GNU General Public |
| License in all respects for all of the Red Hat elfutils code and other |
| code used in conjunction with Red Hat elfutils except the Non-GPL Code |
| covered by this exception. If you modify this file, you may extend this |
| exception to your version of the file, but you are not obligated to do |
| so. If you do not wish to provide this exception without modification, |
| you must delete this exception statement from your version and license |
| this file solely under the GPL without exception. |
| |
| Red Hat elfutils is an included package of the Open Invention Network. |
| An included package of the Open Invention Network is a package for which |
| Open Invention Network licensees cross-license their patents. No patent |
| license is granted, either expressly or impliedly, by designation as an |
| included package. Should you wish to participate in the Open Invention |
| Network licensing program, please visit www.openinventionnetwork.com |
| <http://www.openinventionnetwork.com>. */ |
| |
| #include "libdwflP.h" |
| |
| const char * |
| dwfl_module_getsym (Dwfl_Module *mod, int ndx, |
| GElf_Sym *sym, GElf_Word *shndxp) |
| { |
| if (unlikely (mod == NULL)) |
| return NULL; |
| |
| if (unlikely (mod->symdata == NULL)) |
| { |
| int result = INTUSE(dwfl_module_getsymtab) (mod); |
| if (result < 0) |
| return NULL; |
| } |
| |
| GElf_Word shndx; |
| sym = gelf_getsymshndx (mod->symdata, mod->symxndxdata, ndx, sym, &shndx); |
| if (unlikely (sym == NULL)) |
| { |
| __libdwfl_seterrno (DWFL_E_LIBELF); |
| return NULL; |
| } |
| |
| if (sym->st_shndx != SHN_XINDEX) |
| shndx = sym->st_shndx; |
| |
| if (shndxp != NULL) |
| *shndxp = shndx; |
| |
| switch (shndx) |
| { |
| case SHN_ABS: |
| case SHN_UNDEF: |
| case SHN_COMMON: |
| break; |
| |
| default: |
| if (mod->e_type == ET_REL) |
| { |
| /* In an ET_REL file, the symbol table values are relative |
| to the section, not to the module's load base. */ |
| size_t symshstrndx = SHN_UNDEF; |
| Dwfl_Error result = __libdwfl_relocate_value (mod, mod->symfile->elf, |
| &symshstrndx, |
| shndx, &sym->st_value); |
| if (unlikely (result != DWFL_E_NOERROR)) |
| { |
| __libdwfl_seterrno (result); |
| return NULL; |
| } |
| } |
| /* Apply the bias to the symbol value. */ |
| sym->st_value += mod->symfile->bias; |
| break; |
| } |
| |
| if (unlikely (sym->st_name >= mod->symstrdata->d_size)) |
| { |
| __libdwfl_seterrno (DWFL_E_BADSTROFF); |
| return NULL; |
| } |
| return (const char *) mod->symstrdata->d_buf + sym->st_name; |
| } |
| INTDEF (dwfl_module_getsym) |