[LTP] (no subject)

[路斐]

Hi, Cyril.
Here is my case:


```
[root@rocky arch_prctl]# gcc --version
gcc (GCC) 11.4.1 20230605 (Red Hat 11.4.1-2)
Copyright (C) 2021 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

[root@rocky arch_prctl]# uname -a
Linux rocky 5.14.0-362.18.1.el9_3.0.1.x86_64 #1 SMP PREEMPT_DYNAMIC Sun Feb 11 13:49:23 UTC 2024 x86_64 x86_64 x86_64 GNU/Linux

[root@rocky arch_prctl]# cat arch_prctl01.c 
// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * Copyright (c) UnionTech Software Technology Co.,Ltd., 2024
 * Author: Lu Fei <lufei@uniontech.com>
 */


/*\
 * [Description]
 *
 * Simple test on arch_prctl to set and get cpuid instruction of test thread.
 */


#include "tst_test.h"
#include "lapi/syscalls.h"
#include <stdlib.h>
#ifdef HAVE_ASM_PRCTL_H
#include <asm/prctl.h>


static int arch_prctl_get(int code, unsigned long *addr)
{
	return tst_syscall(__NR_arch_prctl, code, *addr);
}


static int arch_prctl_set(int code, unsigned long addr)
{
	return tst_syscall(__NR_arch_prctl, code, addr);
}


static void run(unsigned int index)
{
	unsigned long *addr = malloc(sizeof(long));


	// index == 0 for disable cpuid, 1 for enable cpuid.
	TST_EXP_PASS(arch_prctl_set(ARCH_SET_CPUID, index));


	TEST(arch_prctl_get(ARCH_GET_CPUID, addr));


	if (TST_RET == index)
		tst_res(TPASS, "get cpuid succeed.");
	else
		tst_res(TFAIL, "get cpuid failed.");
}


static struct tst_test test = {
	.test = run,
	.tcnt = 2,
	.min_kver = "4.12",
	.supported_archs = {"x86_64", "x86", NULL},
};


#else /* HAVE_ASM_PRCTL_H */
TST_TEST_TCONF("missing <asm/prctl.h>");
#endif
[root@rocky arch_prctl]# make clean
rm -f -f -r arch_prctl01  *.o *.pyc .cache.mk *.dwo .*.dwo
[root@rocky arch_prctl]# make check
CHECK testcases/kernel/syscalls/arch_prctl/arch_prctl01.c
arch_prctl01.c:48:10: warning: bogus scalar initializer
[root@rocky arch_prctl]# make
make -C "/root/Develop/ltp/lib" -f "/root/Develop/ltp/lib/Makefile" all
make[1]: Entering directory '/root/Develop/ltp/lib'
GEN ltp-version.h
make[2]: Nothing to be done for 'all'.
make[2]: Nothing to be done for 'all'.
make[1]: Leaving directory '/root/Develop/ltp/lib'
arch_prctl01.c:48:9: warning: braces around scalar initializer
   48 |         .supported_archs = {"x86_64", "x86", NULL},
      |         ^
arch_prctl01.c:48:9: note: (near initialization for ‘test.supported_archs’)
arch_prctl01.c:48:29: warning: initialization of ‘const char * const*’ from incompatible pointer type ‘char *’ [-Wincompatible-pointer-types]
   48 |         .supported_archs = {"x86_64", "x86", NULL},
      |                             ^~~~~~~~
arch_prctl01.c:48:29: note: (near initialization for ‘test.supported_archs’)
arch_prctl01.c:48:39: warning: excess elements in scalar initializer
   48 |         .supported_archs = {"x86_64", "x86", NULL},
      |                                       ^~~~~
arch_prctl01.c:48:39: note: (near initialization for ‘test.supported_archs’)
arch_prctl01.c:48:46: warning: excess elements in scalar initializer
   48 |         .supported_archs = {"x86_64", "x86", NULL},
      |                                              ^~~~
arch_prctl01.c:48:46: note: (near initialization for ‘test.supported_archs’)
CC testcases/kernel/syscalls/arch_prctl/arch_prctl01
```







 路斐 Fei.Lu
Uniontech Technology
site: www.uniontech.com
tel: 18501012352
addr: Xi'an China



 

 
 
 
------------------ Original ------------------
From:  "Cyril Hrubis"<chrubis@suse.cz>;
Date:  Fri, Apr 26, 2024 06:30 PM
To:  "路斐"<lufei@uniontech.com>; 
Cc:  "ltp"<ltp@lists.linux.it>; 
Subject:  Re: Re:

 

Hi!
> I tried using NULL, but met `TBROK: Test killed by SIGSEGV!`.&nbsp;

That means that the manual page is wrong and the address is not ignored.

> And the last time you mentioned in response to using
> `supported_archs`, this seems not work properly by now, the ltp
> document(section of writing_tests) says "not applicable".

The supported_archs is supposed to work. How did you set it (the value)
and what happened?

-- 
Cyril Hrubis
chrubis@suse.cz