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baf2a265c7
By adding an internal alias to avoid the GOT indirection.
On some architecture, __libc_single_thread may be accessed through
copy relocations and thus it requires to update also the copies
default copy.
This is done by adding a new internal macro,
libc_hidden_data_{proto,def}, which has an addition argument that
specifies the alias name (instead of default __GI_ one).
Checked on x86_64-linux-gnu and i686-linux-gnu.
Reviewed-by: Fangrui Song <maskray@google.com>
43 lines
1.5 KiB
C
43 lines
1.5 KiB
C
/* Copyright (C) 2004-2022 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 <pthreadP.h>
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#include <sys/single_threaded.h>
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#include <sysdep.h>
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#define __SETXID_1(cmd, arg1) \
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cmd.id[0] = (long int) arg1
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#define __SETXID_2(cmd, arg1, arg2) \
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__SETXID_1 (cmd, arg1); cmd.id[1] = (long int) arg2
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#define __SETXID_3(cmd, arg1, arg2, arg3) \
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__SETXID_2 (cmd, arg1, arg2); cmd.id[2] = (long int) arg3
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#define INLINE_SETXID_SYSCALL(name, nr, args...) \
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({ \
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int __result; \
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if (!__libc_single_threaded_internal) \
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{ \
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struct xid_command __cmd; \
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__cmd.syscall_no = __NR_##name; \
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__SETXID_##nr (__cmd, args); \
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__result =__nptl_setxid (&__cmd); \
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} \
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else \
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__result = INLINE_SYSCALL (name, nr, args); \
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__result; \
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})
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