111 lines
3.7 KiB
C
111 lines
3.7 KiB
C
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/*
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* Check decoding of remap_file_pages syscall.
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*
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* Copyright (c) 2016-2017 Dmitry V. Levin <ldv@altlinux.org>
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* Copyright (c) 2016-2018 The strace developers.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "tests.h"
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#include <asm/unistd.h>
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#ifdef __NR_remap_file_pages
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# include <stdio.h>
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# include <stdint.h>
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# include <unistd.h>
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# include <linux/mman.h>
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static const char *errstr;
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static long
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k_remap_file_pages(const kernel_ulong_t addr,
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const kernel_ulong_t size,
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const kernel_ulong_t prot,
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const kernel_ulong_t pgoff,
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const kernel_ulong_t flags)
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{
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const long rc = syscall(__NR_remap_file_pages,
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addr, size, prot, pgoff, flags);
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errstr = sprintrc(rc);
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return rc;
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}
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int
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main(void)
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{
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kernel_ulong_t addr = (kernel_ulong_t) 0xfacefeeddeadbeefULL;
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kernel_ulong_t size = (kernel_ulong_t) 0xdefaced1bad2f00dULL;
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kernel_ulong_t prot = PROT_READ|PROT_WRITE|PROT_EXEC;
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kernel_ulong_t pgoff = (kernel_ulong_t) 0xcaf3babebad4deedULL;
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kernel_ulong_t flags = MAP_PRIVATE|MAP_ANONYMOUS;
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k_remap_file_pages(addr, size, prot, pgoff, flags);
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printf("remap_file_pages(%#jx, %ju, %s, %ju, %s) = %s\n",
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(uintmax_t) addr, (uintmax_t) size,
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"PROT_READ|PROT_WRITE|PROT_EXEC",
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(uintmax_t) pgoff, "MAP_PRIVATE|MAP_ANONYMOUS", errstr);
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#ifdef MAP_HUGETLB
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# ifndef MAP_HUGE_2MB
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# ifndef MAP_HUGE_SHIFT
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# define MAP_HUGE_SHIFT 26
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# endif
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# define MAP_HUGE_2MB (21 << MAP_HUGE_SHIFT)
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# endif /* !MAP_HUGE_2MB */
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addr = (kernel_ulong_t) 0xfacefeeddeadf00dULL;
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size = (kernel_ulong_t) 0xdefaced1bad2beefULL;
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prot = (kernel_ulong_t) 0xdefaced00000000ULL | PROT_NONE;
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flags = MAP_TYPE | MAP_FIXED | MAP_NORESERVE | MAP_HUGETLB | MAP_HUGE_2MB;
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k_remap_file_pages(addr, size, prot, pgoff, flags);
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printf("remap_file_pages(%#jx, %ju, %s, %ju"
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/*
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* HP PA-RISC is the only architecture that has MAP_TYPE defined to 0x3, which
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* is also used for MAP_SHARED_VALIDATE since Linux commit v4.15-rc1~71^2^2~23.
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*/
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# ifdef __hppa__
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", MAP_SHARED_VALIDATE"
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# else
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", 0xf /* MAP_??? */"
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# endif
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"|MAP_FIXED|MAP_NORESERVE|MAP_HUGETLB|21<<MAP_HUGE_SHIFT)"
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" = %s\n",
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(uintmax_t) addr, (uintmax_t) size,
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prot == PROT_NONE ? "PROT_NONE" :
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"0xdefaced00000000 /* PROT_??? */",
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(uintmax_t) pgoff, errstr);
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#endif /* MAP_HUGETLB */
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puts("+++ exited with 0 +++");
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return 0;
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}
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#else
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SKIP_MAIN_UNDEFINED("__NR_remap_file_pages")
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#endif
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