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153
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1 /*
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2 * Copyright (c) 1995 by Sun Microsystems, Inc.
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3 * All rights reserved.
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4 *
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5 * This source code is a product of Sun Microsystems, Inc. and is provided
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6 * for unrestricted use provided that this legend is included on all tape
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7 * media and as a part of the software program in whole or part. Users
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8 * may copy or modify this source code without charge, but are not authorized
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9 * to license or distribute it to anyone else except as part of a product or
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10 * program developed by the user.
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11 *
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12 * THIS PROGRAM CONTAINS SOURCE CODE COPYRIGHTED BY SUN MICROSYSTEMS, INC.
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13 * SUN MICROSYSTEMS, INC., MAKES NO REPRESENTATIONS ABOUT THE SUITABLITY
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14 * OF SUCH SOURCE CODE FOR ANY PURPOSE. IT IS PROVIDED "AS IS" WITHOUT
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15 * EXPRESS OR IMPLIED WARRANTY OF ANY KIND. SUN MICROSYSTEMS, INC. DISCLAIMS
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16 * ALL WARRANTIES WITH REGARD TO SUCH SOURCE CODE, INCLUDING ALL IMPLIED
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17 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN
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18 * NO EVENT SHALL SUN MICROSYSTEMS, INC. BE LIABLE FOR ANY SPECIAL, INDIRECT,
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19 * INCIDENTAL, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING
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20 * FROM USE OF SUCH SOURCE CODE, REGARDLESS OF THE THEORY OF LIABILITY.
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21 *
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22 * This source code is provided with no support and without any obligation on
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23 * the part of Sun Microsystems, Inc. to assist in its use, correction,
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24 * modification or enhancement.
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25 *
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26 * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE
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27 * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY THIS
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28 * SOURCE CODE OR ANY PART THEREOF.
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29 *
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30 * Sun Microsystems, Inc.
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31 * 2550 Garcia Avenue
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32 * Mountain View, California 94043
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33 */
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34
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35 /*
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36 * Update the value of the `_edata' and `_end' symbols.
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37 */
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38 #pragma ident "@(#) $Id: syms.c,v 1.3 1997/05/29 04:22:30 steve Exp $ - SMI"
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39
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40 #include <libelf.h>
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41 #include <string.h>
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42 #include "machdep.h"
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43 #include "_dynodump.h"
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44
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45 void
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46 update_sym(Cache * cache, Cache * _cache, Addr edata)
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47 {
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48 char *strs;
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49 Sym *syms;
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50 Shdr *shdr;
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51 int symn, cnt;
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52
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53 /*
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54 * Set up to read the symbol table and its associated string table.
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55 */
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56 shdr = _cache->c_shdr;
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57 syms = (Sym *) _cache->c_data->d_buf;
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58 symn = shdr->sh_size / shdr->sh_entsize;
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59
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60 strs = (char *) cache[shdr->sh_link].c_data->d_buf;
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61
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62 /*
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63 * Loop through the symbol table looking for `_end' and `_edata'.
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64 */
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65 for (cnt = 0; cnt < symn; cnt++, syms++) {
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66 char *name = strs + syms->st_name;
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67
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68 if (strcmp(name, "_end") && strcmp(name, "_edata"))
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69 continue;
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70
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71 syms->st_value = edata;
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72 }
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73 }
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