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/*
* libpulp - User-space Livepatching Library
*
* Copyright (C) 2021 SUSE Software Solutions GmbH
*
* This file is part of libpulp.
*
* libpulp is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* libpulp 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with libpulp. If not, see <http://www.gnu.org/licenses/>.
*/
#include <err.h>
#include <stdio.h>
#include <stdlib.h>
#include "../include/ulp_common.h"
// ti is overriden in the livepatching process. It must not be declared static
// else the compiler may remove the variable because it is unreferenced.
tls_index ti = { 0 };
static char *ulpr_string = "String from live patch";
void *__tls_get_addr(tls_index *);
#define SWAP(a,b) { typeof(a) _t = (a); (a) = (b); (b) = _t; }
void
new_banner_set(__attribute__((unused)) char *new)
{
if (ti.ti_module == 0 && ti.ti_offset == 0)
errx(EXIT_FAILURE, "Live patch data references not initialized");
char **ulpr_banner = __tls_get_addr(&ti);
printf("module: %lx, offset: %lx\n", ti.ti_module, ti.ti_offset);
printf("addr: 0x%lx\n", (unsigned long)ulpr_banner);
*ulpr_banner = ulpr_string;
}
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