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/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2006 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*
* Update the symbol table entries:
*
* o If addr is non-zero then every symbol entry is updated to indicate the
* new location to which the object will be mapped.
*
* o The address of the `_edata' and `_end' symbols, and their associated
* section, is updated to reflect any new heap addition.
*/
#include <libelf.h>
#include <string.h>
#include "sgs.h"
#include "machdep.h"
#include "msg.h"
#include "_librtld.h"
void
update_sym(Cache *cache, Cache *_cache, Addr edata, Half endx, Addr addr)
{
char *strs;
Sym *syms;
Shdr *shdr;
Xword symn, cnt;
/*
* Set up to read the symbol table and its associated string table.
*/
shdr = _cache->c_shdr;
syms = (Sym *)_cache->c_data->d_buf;
symn = shdr->sh_size / shdr->sh_entsize;
strs = (char *)cache[shdr->sh_link].c_data->d_buf;
/*
* Loop through the symbol table looking for `_end' and `_edata'.
*/
for (cnt = 0; cnt < symn; cnt++, syms++) {
char *name = strs + syms->st_name;
if (addr) {
if (syms->st_value)
syms->st_value += addr;
}
if ((name[0] != '_') || (name[1] != 'e'))
continue;
if (strcmp(name, MSG_ORIG(MSG_SYM_END)) &&
strcmp(name, MSG_ORIG(MSG_SYM_EDATA)))
continue;
syms->st_value = edata + addr;
if (endx)
syms->st_shndx = endx;
}
}
int
syminfo(Cache *_cache, Alist **nodirect)
{
Syminfo *info;
Shdr *shdr;
Word num, ndx;
shdr = _cache->c_shdr;
info = (Syminfo *)_cache->c_data->d_buf;
num = (Word)(shdr->sh_size / shdr->sh_entsize);
/*
* Traverse the syminfo section recording the index of all nodirect
* symbols.
*/
for (ndx = 1, info++; ndx < num; ndx++, info++) {
if ((info->si_flags & SYMINFO_FLG_NOEXTDIRECT) == 0)
continue;
if (alist_append(nodirect, &ndx, sizeof (Word), 20) == 0)
return (1);
}
return (0);
}
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