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104 lines
3.3 KiB
104 lines
3.3 KiB
/* |
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* Check decoding of prctl PR_GET_TID_ADDRESS operation. |
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* |
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* Copyright (c) 2016 Eugene Syromyatnikov <evgsyr@gmail.com> |
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* Copyright (c) 2016-2017 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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#include <linux/prctl.h> |
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#if defined __NR_prctl && defined __NR_set_tid_address && \ |
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defined PR_GET_TID_ADDRESS |
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# include <inttypes.h> |
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# include <stdio.h> |
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# include <unistd.h> |
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static const char * |
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sprintaddr(kernel_ulong_t addr) |
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{ |
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static char buf[sizeof("0x") + sizeof(addr) * 2]; |
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if (addr) { |
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snprintf(buf, sizeof(buf), "%#llx", (unsigned long long) addr); |
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return buf; |
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} |
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return "NULL"; |
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} |
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int |
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main(void) |
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{ |
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static const kernel_ulong_t bogus_addr = |
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(kernel_ulong_t) 0xfffffffffffffffdULL; |
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/* Note that kernel puts kernel-sized pointer even on x32 */ |
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TAIL_ALLOC_OBJECT_CONST_PTR(kernel_ulong_t, ptr); |
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long rc; |
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long set_ok; |
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*ptr = (kernel_ulong_t) 0xbadc0dedda7a1057ULL; |
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rc = syscall(__NR_prctl, PR_GET_TID_ADDRESS, NULL); |
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printf("prctl(PR_GET_TID_ADDRESS, NULL) = %s\n", sprintrc(rc)); |
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rc = syscall(__NR_prctl, PR_GET_TID_ADDRESS, bogus_addr); |
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printf("prctl(PR_GET_TID_ADDRESS, %#llx) = %s\n", |
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(unsigned long long) bogus_addr, sprintrc(rc)); |
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rc = syscall(__NR_prctl, PR_GET_TID_ADDRESS, ptr); |
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if (rc) { |
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printf("prctl(PR_GET_TID_ADDRESS, %p) = %s\n", |
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ptr, sprintrc(rc)); |
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} else { |
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printf("prctl(PR_GET_TID_ADDRESS, [%s]) = %s\n", |
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sprintaddr(*ptr), sprintrc(rc)); |
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} |
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set_ok = syscall(__NR_set_tid_address, bogus_addr); |
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rc = syscall(__NR_prctl, PR_GET_TID_ADDRESS, ptr); |
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if (rc) { |
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printf("prctl(PR_GET_TID_ADDRESS, %p) = %s\n", |
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ptr, sprintrc(rc)); |
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} else { |
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printf("prctl(PR_GET_TID_ADDRESS, [%s]) = %s\n", |
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sprintaddr(set_ok ? bogus_addr : *ptr), sprintrc(rc)); |
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} |
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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_prctl && __NR_set_tid_address && PR_GET_TID_ADDRESS") |
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#endif
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