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47 lines
1.8 KiB
C
47 lines
1.8 KiB
C
/* Definition for thread-local data handling. nptl/x32 version.
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Copyright (C) 2012-2015 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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<http://www.gnu.org/licenses/>. */
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#ifndef _X32_TLS_H
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#define _X32_TLS_H 1
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#include_next <tls.h>
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#ifndef __ASSEMBLER__
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/* X32 doesn't support 32-bit indirect calls via memory. Instead, we
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load the 32-bit address from memory into the lower 32 bits of the
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return-value register, which will automatically zero-extend the upper
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32 bits of the return-value register. We then do the indirect call
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via the 64-bit return-value register. */
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# undef CALL_THREAD_FCT
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# define CALL_THREAD_FCT(descr) \
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({ void *__res; \
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asm volatile ("movl %%fs:%P2, %%edi\n\t" \
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"movl %%fs:%P1, %k0\n\t" \
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"callq *%q0" \
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: "=a" (__res) \
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: "i" (offsetof (struct pthread, start_routine)), \
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"i" (offsetof (struct pthread, arg)) \
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: "di", "si", "cx", "dx", "r8", "r9", "r10", "r11", \
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"memory", "cc"); \
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__res; })
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#endif /* __ASSEMBLER__ */
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#endif /* x32/tls.h */
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