Dmitry V. Levin
92d7499fbf
Assuming that syscalls may return negative values only as error codes, always print non-error syscall return codes as unsigned. * defs.h (RVAL_UDECIMAL): Remove. (RVAL_DECIMAL): Rename to RVAL_UDECIMAL. * syscall.c (syscall_exiting_trace) <case RVAL_DECIMAL>: Remove. * clone.c (SYS_FUNC(fork)): Remove RVAL_UDECIMAL. * lseek.c (SYS_FUNC(lseek)): Likewise. * prctl.c (SYS_FUNC(prctl)): Likewise. * uid.c (SYS_FUNC(getuid), SYS_FUNC(setfsuid)): Likewise. * times.c (SYS_FUNC(times)): Always return 0. * tests/inject-nf.c (main): Update expected output.
87 lines
2.7 KiB
C
87 lines
2.7 KiB
C
/*
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* Check decoding of return values injected into a syscall that "never fails".
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*
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* Copyright (c) 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 <assert.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <asm/unistd.h>
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#include "raw_syscall.h"
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#ifdef __alpha__
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/* alpha has no getpid */
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# define SC_NR __NR_getpgrp
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# define SC_NAME "getpgrp"
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# define getpid getpgrp
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#else
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# define SC_NR __NR_getpid
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# define SC_NAME "getpid"
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#endif
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#ifdef raw_syscall_0
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# define INVOKE_SC(err) raw_syscall_0(SC_NR, &err)
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#else
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/* No raw_syscall_0, let's use getpid() and hope for the best. */
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# define INVOKE_SC(err) getpid()
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#endif
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/*
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* This prototype is intentionally different
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* from the prototype provided by <unistd.h>.
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*/
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extern kernel_ulong_t getpid(void);
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int
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main(int ac, char **av)
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{
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assert(ac == 1 || ac == 2);
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kernel_ulong_t expected =
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(ac == 1) ? getpid() : strtoull(av[1], NULL, 0);
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kernel_ulong_t err = 0;
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kernel_ulong_t rc = INVOKE_SC(err);
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if (err || rc != expected)
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error_msg_and_fail("expected %#llx, got rval=%#llx err=%#llx",
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(unsigned long long) expected,
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(unsigned long long) rc,
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(unsigned long long) err);
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if (ac == 2) {
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printf("%s() = %llu (INJECTED)\n",
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SC_NAME, (unsigned long long) rc);
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puts("+++ exited with 0 +++");
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}
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return 0;
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}
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