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2e274cd8c1
Similar to ppoll, the poll.h header needs to redirect the poll call to a proper fortified ppoll with 64 bit time_t support. The implementation is straightforward, just need to add a similar check as __poll_chk and call the 64 bit time_t ppoll version. The debug fortify tests are also extended to cover 64 bit time_t for affected ABIs. Unfortunately it requires an aditional symbol, which makes backport tricky. One possibility is to add a static inline version if compiler supports is and call abort instead of __chk_fail, so fortified version will call __poll64 in the end. Another possibility is to just remove the fortify support for _TIME_BITS=64. Checked on i686-linux-gnu.
43 lines
1.3 KiB
C
43 lines
1.3 KiB
C
/* Fortify ppoll implementation. Linux version.
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Copyright (C) 2022 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<https://www.gnu.org/licenses/>. */
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#include <poll.h>
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int
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__ppoll64_chk (struct pollfd *fds, nfds_t nfds,
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const struct __timespec64 *tmo, const __sigset_t *ss,
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__SIZE_TYPE__ fdslen)
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{
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if (fdslen / sizeof (*fds) < nfds)
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__chk_fail ();
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return __ppoll64 (fds, nfds, tmo, ss);
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}
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#if __TIMESIZE != 64
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int
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__ppoll_chk (struct pollfd *fds, nfds_t nfds, const struct timespec *tmo,
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const __sigset_t *ss, __SIZE_TYPE__ fdslen)
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{
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if (fdslen / sizeof (*fds) < nfds)
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__chk_fail ();
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return ppoll (fds, nfds, tmo, ss);
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}
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#endif
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