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/*
* Copyright (c) 2017 Cyril Hrubis <chrubis@suse.cz>
*
* This program 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 2 of the License, or
* (at your option) any later version.
*
* This program 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, see <http://www.gnu.org/licenses/>.
*/
#include <sys/personality.h>
#include <sys/utsname.h>
#include "test.h"
#include "tst_kernel.h"
static int get_kernel_bits_from_uname(struct utsname *buf)
{
if (uname(buf)) {
tst_brkm(TBROK | TERRNO, NULL, "uname()");
return -1;
}
return strstr(buf->machine, "64") ? 64 : 32;
}
int tst_kernel_bits(void)
{
struct utsname buf;
int kernel_bits = get_kernel_bits_from_uname(&buf);
if (kernel_bits == -1)
return -1;
/*
* ARM64 (aarch64) defines 32-bit compatibility modes as
* armv8l and armv8b (little and big endian).
* s390x is 64bit but not contain 64 in the words.
*/
if (!strcmp(buf.machine, "armv8l") || !strcmp(buf.machine, "armv8b")
|| !strcmp(buf.machine, "s390x"))
kernel_bits = 64;
#ifdef __ANDROID__
/* Android's bionic libc sets the PER_LINUX32 personality for all 32-bit
* programs. This will cause buf.machine to report as i686 even though
* the kernel itself is 64-bit.
*/
if (!strcmp(buf.machine, "i686") &&
(personality(0xffffffff) & PER_MASK) == PER_LINUX32) {
/* Set the personality back to the default. */
if (personality(PER_LINUX) == -1) {
tst_brkm(TBROK | TERRNO, NULL, "personality()");
return -1;
}
/* Redo the uname check without the PER_LINUX32 personality to
* determine the actual kernel bits value.
*/
kernel_bits = get_kernel_bits_from_uname(&buf);
if (kernel_bits == -1)
return -1;
/* Set the personality back to PER_LINUX32. */
if (personality(PER_LINUX32) == -1) {
tst_brkm(TBROK | TERRNO, NULL, "personality()");
return -1;
}
}
#endif /* __ANDROID__ */
tst_resm(TINFO, "uname.machine=%s kernel is %ibit",
buf.machine, kernel_bits);
return kernel_bits;
}
int tst_check_driver(const char *name)
{
#ifndef __ANDROID__
const char * const argv[] = { "modprobe", "-n", name, NULL };
int res = tst_cmd_(NULL, argv, "/dev/null", "/dev/null",
TST_CMD_PASS_RETVAL);
/* 255 - it looks like modprobe not available */
return (res == 255) ? 0 : res;
#else
/* Android modprobe may not have '-n', or properly installed
* module.*.bin files to determine built-in drivers. Assume
* all drivers are available.
*/
return 0;
#endif
}
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