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// SPDX-License-Identifier: AGPL-3.0-or-later
/* PASST - Plug A Simple Socket Transport
* for qemu/UNIX domain socket mode
*
* PASTA - Pack A Subtle Tap Abstraction
* for network namespace/tap device mode
*
* arch.c - Architecture-specific implementations
*
* Copyright (c) 2022 Red Hat GmbH
* Author: Stefano Brivio <sbrivio@redhat.com>
*/
#include <limits.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>
/**
* arch_avx2_exec() - Run AVX2 build if supported, drop suffix from argv[0]
* @argv: Arguments from command line
*/
#ifdef __x86_64__
static char avx2_path[PATH_MAX];
void arch_avx2_exec(char **argv)
{
char *p = strstr(argv[0], ".avx2");
if (p) {
*p = 0;
} else if (__builtin_cpu_supports("avx2")) {
snprintf(avx2_path, PATH_MAX, "%s.avx2", argv[0]);
argv[0] = avx2_path;
execve(avx2_path, argv, environ);
perror("Can't run AVX2 build, using non-AVX2 version");
}
}
#else
void arch_avx2_exec(char **argv) { (void)argv; }
#endif
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