1 /* 2 * Copyright (c) 2017 The strace developers. 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. The name of the author may not be used to endorse or promote products 14 * derived from this software without specific prior written permission. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 21 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 25 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 26 */ 27 28 #include "tests.h" 29 #include <stdint.h> 30 #include <stdio.h> 31 #include <sys/mman.h> 32 #include <unistd.h> 33 #include <asm/unistd.h> 34 35 static const char *errstr; 36 37 static long k_madvise(const kernel_ulong_t addr,const kernel_ulong_t length,const kernel_ulong_t advice)38 k_madvise(const kernel_ulong_t addr, 39 const kernel_ulong_t length, 40 const kernel_ulong_t advice) 41 { 42 long rc = syscall(__NR_madvise, addr, length, advice); 43 errstr = sprintrc(rc); 44 return rc; 45 } 46 47 int main(void)48 main(void) 49 { 50 const unsigned long length = get_page_size(); 51 void *const addr = tail_alloc(length); 52 long rc; 53 54 rc = madvise(addr, length, MADV_NORMAL); 55 printf("madvise(%p, %lu, MADV_NORMAL) = %s\n", 56 addr, length, sprintrc(rc)); 57 58 static const kernel_ulong_t advice = 59 (kernel_ulong_t) 0xfacefeed00000000ULL | MADV_RANDOM; 60 rc = k_madvise((uintptr_t) addr, length, advice); 61 printf("madvise(%p, %lu, MADV_RANDOM) = %s\n", 62 addr, length, sprintrc(rc)); 63 64 static const kernel_ulong_t bogus_length = 65 (kernel_ulong_t) 0xfffffffffffffaceULL; 66 rc = k_madvise(0, bogus_length, MADV_SEQUENTIAL); 67 printf("madvise(NULL, %llu, MADV_SEQUENTIAL) = %s\n", 68 (unsigned long long) bogus_length, sprintrc(rc)); 69 70 if (F8ILL_KULONG_SUPPORTED) { 71 rc = k_madvise(f8ill_ptr_to_kulong(addr), length, MADV_NORMAL); 72 printf("madvise(%#llx, %lu, MADV_NORMAL) = %s\n", 73 (unsigned long long) f8ill_ptr_to_kulong(addr), 74 length, sprintrc(rc)); 75 } 76 77 puts("+++ exited with 0 +++"); 78 return 0; 79 } 80