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1 /* |
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2 nextscn.c - implementation of the elf_nextscn(3) function. |
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3 Copyright (C) 1995 - 1998 Michael Riepe |
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4 |
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5 This library is free software; you can redistribute it and/or |
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6 modify it under the terms of the GNU Library General Public |
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7 License as published by the Free Software Foundation; either |
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8 version 2 of the License, or (at your option) any later version. |
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9 |
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10 This library is distributed in the hope that it will be useful, |
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11 but WITHOUT ANY WARRANTY; without even the implied warranty of |
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12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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13 Library General Public License for more details. |
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14 |
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15 You should have received a copy of the GNU Library General Public |
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16 License along with this library; if not, write to the Free Software |
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17 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
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18 */ |
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19 |
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20 #include <private.h> |
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21 |
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22 #ifndef lint |
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23 static const char rcsid[] = "@(#) $Id: nextscn.c,v 1.6 2005/05/21 15:39:25 michael Exp $"; |
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24 #endif /* lint */ |
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25 |
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26 Elf_Scn* |
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27 elf_nextscn(Elf *elf, Elf_Scn *scn) { |
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28 if (!elf) { |
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29 return NULL; |
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30 } |
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31 elf_assert(elf->e_magic == ELF_MAGIC); |
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32 if (scn) { |
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33 elf_assert(scn->s_magic == SCN_MAGIC); |
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34 if (scn->s_elf == elf) { |
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35 return scn->s_link; |
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36 } |
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37 seterr(ERROR_ELFSCNMISMATCH); |
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38 } |
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39 else if (elf->e_kind != ELF_K_ELF) { |
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40 seterr(ERROR_NOTELF); |
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41 } |
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42 else if (elf->e_ehdr || _elf_cook(elf)) { |
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43 elf_assert(elf->e_ehdr); |
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44 for (scn = elf->e_scn_1; scn; scn = scn->s_link) { |
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45 elf_assert(scn->s_magic == SCN_MAGIC); |
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46 elf_assert(scn->s_elf == elf); |
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47 if (scn->s_index == 1) { |
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48 return scn; |
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49 } |
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50 } |
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51 seterr(ERROR_NOSUCHSCN); |
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52 } |
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53 return NULL; |
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54 } |