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100 lines
2.8 KiB
100 lines
2.8 KiB
/*
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* Copyright (c) 2017 Cyril Hrubis <chrubis@suse.cz>
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <sys/personality.h>
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#include <sys/utsname.h>
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#include "test.h"
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#include "tst_kernel.h"
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static int get_kernel_bits_from_uname(struct utsname *buf)
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{
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if (uname(buf)) {
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tst_brkm(TBROK | TERRNO, NULL, "uname()");
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return -1;
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}
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return strstr(buf->machine, "64") ? 64 : 32;
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}
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int tst_kernel_bits(void)
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{
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struct utsname buf;
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int kernel_bits = get_kernel_bits_from_uname(&buf);
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if (kernel_bits == -1)
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return -1;
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/*
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* ARM64 (aarch64) defines 32-bit compatibility modes as
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* armv8l and armv8b (little and big endian).
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* s390x is 64bit but not contain 64 in the words.
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*/
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if (!strcmp(buf.machine, "armv8l") || !strcmp(buf.machine, "armv8b")
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|| !strcmp(buf.machine, "s390x"))
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kernel_bits = 64;
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#ifdef __ANDROID__
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/* Android's bionic libc sets the PER_LINUX32 personality for all 32-bit
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* programs. This will cause buf.machine to report as i686 even though
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* the kernel itself is 64-bit.
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*/
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if (!strcmp(buf.machine, "i686") &&
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(personality(0xffffffff) & PER_MASK) == PER_LINUX32) {
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/* Set the personality back to the default. */
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if (personality(PER_LINUX) == -1) {
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tst_brkm(TBROK | TERRNO, NULL, "personality()");
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return -1;
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}
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/* Redo the uname check without the PER_LINUX32 personality to
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* determine the actual kernel bits value.
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*/
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kernel_bits = get_kernel_bits_from_uname(&buf);
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if (kernel_bits == -1)
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return -1;
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/* Set the personality back to PER_LINUX32. */
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if (personality(PER_LINUX32) == -1) {
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tst_brkm(TBROK | TERRNO, NULL, "personality()");
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return -1;
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}
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}
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#endif /* __ANDROID__ */
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tst_resm(TINFO, "uname.machine=%s kernel is %ibit",
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buf.machine, kernel_bits);
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return kernel_bits;
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}
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int tst_check_driver(const char *name)
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{
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#ifndef __ANDROID__
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const char * const argv[] = { "modprobe", "-n", name, NULL };
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int res = tst_run_cmd_(NULL, argv, "/dev/null", "/dev/null", 1);
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/* 255 - it looks like modprobe not available */
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return (res == 255) ? 0 : res;
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#else
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/* Android modprobe may not have '-n', or properly installed
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* module.*.bin files to determine built-in drivers. Assume
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* all drivers are available.
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*/
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return 0;
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#endif
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}
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