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/* pie_redirect_table.c -- module load/unload hooks for libwolfssl.ko
*
* Copyright (C) 2006-2025 wolfSSL Inc.
*
* This file is part of wolfSSL.
*
* wolfSSL 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; either version 3 of the License, or
* (at your option) any later version.
*
* wolfSSL 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 this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1335, USA
*/
#ifndef __PIE__
#error pie_redirect_table.c must be compiled -fPIE.
#endif
#include <wolfssl/wolfcrypt/libwolfssl_sources.h>
#include <wolfssl/ssl.h>
/* compiling -fPIE results in references to the GOT or equivalent thereof, which remain after linking
* even if all other symbols are resolved by the link. naturally there is no
* GOT in the kernel, and the wolfssl Kbuild script explicitly checks that no
* GOT relocations occur in the PIE objects, but we still need to include a
* dummy value here, scoped to the module, to eliminate the otherwise unresolved
* symbol.
*/
#if defined(CONFIG_X86)
extern void * const _GLOBAL_OFFSET_TABLE_;
void * const _GLOBAL_OFFSET_TABLE_ = 0;
#elif defined(CONFIG_MIPS)
extern void * const _gp_disp;
void * const _gp_disp = 0;
#endif
struct wolfssl_linuxkm_pie_redirect_table wolfssl_linuxkm_pie_redirect_table;
const struct wolfssl_linuxkm_pie_redirect_table
*wolfssl_linuxkm_get_pie_redirect_table(void) {
return &wolfssl_linuxkm_pie_redirect_table;
}
/* placeholder implementations for missing functions. */
#if defined(CONFIG_MIPS)
#undef memcpy
void *memcpy(void *dest, const void *src, size_t n) {
char *dest_i = (char *)dest;
char *dest_end = dest_i + n;
char *src_i = (char *)src;
while (dest_i < dest_end)
*dest_i++ = *src_i++;
return dest;
}
#undef memset
void *memset(void *dest, int c, size_t n) {
char *dest_i = (char *)dest;
char *dest_end = dest_i + n;
while (dest_i < dest_end)
*dest_i++ = c;
return dest;
}
#endif
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